Fly-wheel for explosive-engines.



No. 764,356. PATENTED JULY 5, 1904.

W. B. HAYDEN.

FLY WHEEL FOB. EXPLOSIVE ENGINES.

APPLICATION FILED MAR. 28, 1904.

N0 MODEL. 2 SHEETS-SHEET 1.

munmnumnm No- 764,356. PATENTED JULY 5, 1904- HAYDEN.

EXPLUSJVE ENGINES.

FILED MAR. 28. 1904.

ZSHEETS sun 2 FLY WHEEL FOR V APPLIOATIO UNITED STATES Patented July 5, 190

WILLIAM B. HAYDEN, OF NEW YORK, N. Y.

FLY-WHEEL FOR EXPLOSIVE-ENGINES.

SPECIFICATION forming part of Letters Patent No. 764,356, dated July "5, 1904.

Application filed March 28, 1904.

To all whom it may concern:

Be it known that I, WILLIAM B. HAYD N, a citizen of the United States, residing at New York, in the county of New York and State of NewYork, have invented new and useful Improvements in Fly-Wheels for Explosive-Engines, of which the following is a specification.

This invention relates to fly-wheels for explosive-engines.

In explosive-engines as now generally constructed certain difficulties are presented in overcoming the inertia of a liy-wheel on the initial explosion to overcome the strain upon; the machinery when starting. To overcome this inertia of the fly-wheel, it necessitates; generally the initial operating of the fly-wheel by hand or by a crank, which causes such initial operation to be inconvenient and laborious to the operator.

Therefore it is the object of this invention to overcome this inconvenient and laborious manner of initially operating the fly-wheel and to provide a new and novel form of flywheel for explosive engines whereby the strain upon the machinery caused by the inertia of the fly-wheel when starting or reversing the engine is practically avoided.

In fly-wheels as generally constructed the entire fly-wheel is keyed rigidlyto the engineshaft; but in accordance with this invention the fly-wheel is formed of two sections, an

outer and an inner section, and the inner section is the only part of the fly-wheel which is keyed rigidly to the engine-shaft, while the outer or heavier section is loosely fitted upon the inner section, and the said sections are bodily movable together in both directionsthat is to say, bodily movable together whether the engine is running ahead or in a reverse direction-through the medium of a suit able frictional coupling device interposed between said sections, said device being so adjusted that the inertia of the weighted outer section is overcome gradually, dividing the strain during one-half stroke instead of on the instant of explosion, thereby avoiding all serious strain upon the engine and making it practicable to start when stationary or reverse while in motion. i

The invention further aims to construct a Serial No. 200,423. (No model.)

fly-wheel for the purpose set forth which shall be extremely simple in its construction, strong, durable, efficient in its use, and cornparatively inexpensive to set up.

WVith the foregoing and other objects in view the invention consists of a novel combination and arrangement of parts hereinafter more specifically described, illustrated in the accompanying drawings, and particularly pointed out in the claims hereunto appended.

In describing theinvention in detail reference is had to the accompanying drawings, forming a part of this specification, wherein like reference characters denote corresponding parts throughout the several views, and in whiclrf Figure 1 is a side elevation of the preferred form of fly-wheel for explosive-engines setup in accordance with this invention. Fig. 2 is a vertical sectional View thereof. Fig. 3 is a partsectional side elevation of the inner section. Fig. 4 is a side elevation of a frictional coupling device in accordance with this invention for forming a normal frictional union between the inner and outer sections. Fig. 5 is a sectional detail view of thewheel. showing one of the adjusting devices for the frictional coupling device. Fig. 6 is a sectional elevation of the outer section of the wheel. Fig. 7 is a side elevation, partly in section, of a modified form of wheel constructed in accordance with this invention; .andFigs. 8 and 9 are details of the modified form of wheel.

The wheel is formed of an inner section 1 and a weighted outer section 2, with a normal frictional union interposed botweensaid sections. The inner or lighter section 1 is in the form of a wheel, isfixedly connected to the engine-shaft 3, is provided with a plurality of peripheral grooves, as shown two in number and designated by the reference characters 4 5. 'lihe number of peripheral grooves can be increased, if desired. The peripheral grooves are separated by a pair of lugs 6, formed on the rim of the inner section 1, and the said lugs 6 form partitions, so as to separate the grooves, and the lugs 6 also form stops for the members of the frictional coupling device, to be hereinafter referred to. If the number of grooves in the periphery of the inner section 1 is increased, then the necessary number of lugs 6 will be employed. The rim of the inner section 1 has extending inwardly therefrom a plurality of projections 7, recessed, as at 8, and provided with a screwthreaded opening 9. The recesses 8 communicate with the grooves 4. 5, and said openings 9 communicate with said recesses and are of smaller diameter than the recesses. The recesses 8 form What may be termed pockets to receive the bushings 10 and the adjustingsprings 11. Through the openings 9 extend adjustin -screws 12 for the springs 11, and said screws 12 carry on their inner ends the compression-plates 13 and on their outer ends the heads 14.

The coupling devices for causing a normal frictional union between the inner and outer sections consist of a plurality of segmental frictional coupling members, as shown two in number and which are indicated by the reference characters 15 16. It will be evident that the number of coupling members can be increased to correspond with the number of peripheral grooves in the inner section 1. The outer portion of each of the members 15 16 is preferably of V shape in cross-section; but it is evident the contour of the outer portion of said members can be such as desired.

The outer section 1 is in the form of a weighted band, and it will be evident that the diameter of said band can be changed as oocasion requiresthat is to say, to increase or (Lei-ease the weight of the outer section.

The inner face of the outer section 2 is provided with a continuous V-shaped groove 17, said groove corresponding in contour to the: outer portion of the coupling members 15 16,

and said groove 17 is adapted to receive the outer portion of the coupling members, so as to cause a normal frictional engagement between the inner and outer sections. The grooves in the rim of the inner section 1 are adapted to receive the coupling members, and said members abut against the lugs 6, so that when the inner section is rotated said section will carry the coupling members therewith, or, in other words, the coupling members are not movable independently in a rotating manner of the inner section 1. The adjustingsprings 11 are adapted to so adjust the coupling members as to obtain the necessary frictional engagement between the outer section 2 and the inner section 1. If the outer section 2 is unusually heavy, then the springs 11 will be compressed much greater than if the outer section 2 were lighter. The adjustment of the springs 11 is in accordance with the Weight of the outer section 2.

In the modified form of construction shown .in Figs. 7, 8, and 9 the inner section is designated. by the reference character 18 and the outer section by the reference character 19. The adjusting devices for the frictional inner section 18 of the modified form is not provided with peripheral grooves in the manner as the inner section 1, but is provided with a plurality of recesses 20, in which is mounted the segment-shaped coupling members 21, having the outer portion thereof substantially V-shaped in contour or of any other preferred shape, and the members 21 are provided with inwardly extending offsets 22, abutting against the adjusting springs 11. The outer section 19, Fig. 7, is provided with an inner band 23, connected to the outer band through the medium of the webs 24, and the inner face of said inner band 23 is provided with a continuous groove 25 of the same contour as the outer portion of the segmental frictional couplingmembers 21.

In both structures set forth the frictional coupling members form a normal frictional union between the outer and inner sections; but this frictional union is such that when the inner section is rotated through the medium of the engine-shaft the inertia of the outer section is gradually overcome, owing to the fact that the inner section moves in advance of the outer section and does not take up the outer section until a half-stroke has been made, and by such operation it is evident that on starting the engine the heavier strains upon the machinery are overcome for the reason that the fly-wheel as an entirety does not operate on initially starting, but the weighted portion of the fly-wheel is taken up after the engine has started. By providing the fly-wheel in such a manner that the inner section operates in advance of the heavier or weighted section the engine will be enabled to be started without heavy strains upon the machinery thereof, or, in other words, the engine can be started or reversed so that the inertia of the weighted portion of the fly-wheel is gradually overcome. If the engine is reversed, theinner section will travel for an instant in an opposite direction to that of the outer section, but will eventually carry the outer section therewith owing to the frictional coupling devices. I

From the foregoing description, taken in connection with the accompanying drawings,

it will be evident that a fly-wheel for explosiveengines is set up so that the inertia of the weighted outer section is gradually overcome,

consequently dividing the strain during onehalf stroke instead of on the instant of explosion, or rather when initially starting the engine, and by such an arrangement all serious strain upon the engine is practically avoided, and it is thought that the many advantages of such construction of fly-wheel for explosive-engines can be thoroughly understood, and it will furthermore be evident that various changes and modifications of the details of the invention can be resorted to without departing from the spirit of the invention, and therefore the right is reserved to make all necessary changes, variations, and modifications which come properly within the scope of the protection prayed as set forth in the claims hereunto appended.

Having thus described the invention, what is claimed is 1. A fiy-wheel for explosive-engines comprising an inner section, an outer section inclosing said inner section, and means for preservinga normal frictional union between said sections.

2. A fly-wheel for explosive-engines comprising an inner section, an outer section inclosing said inner section, and adjustable means for preserving a normal frictional union between said sections.

3. A fly-wheel for explosive-engines comprising an inner section, a separate outer section inclosingsaid inner section and of greater weight than said inner section, and adjustable means for preserving a normal frictional union between said sections.

4. A fiy-wheel for explosive-engines comprising an inner section adapted to be fixed to the engine-shaft, a removable outer section inclosing said inner section, and means carried by the inner section and engaging in the outer section for preserving a normal frictional union between said sections.

'5. A fly-wheel for explosive-engines comprising an inner section adapted to be fixed to the engine-shaft, a removable outer section inclosing said inner section, and adjustable means carried by the inner section and engaging in the outer section for preserving a normal frictional union between said sections.

6. A fly-wheel for explosive-engines comprising an inner section adapted to be fixed to the engine-shaft, a removable outer section mounted upon said inner section and having its inner face provided with a continuous groove, and coupling members carried by the inner section and adapted to engage in said groove for frictionally connecting said sections together when said inner section is operated in either direction.

7. A fly-wheel for explosive-engines comprising an inner section adapted to be connected to the engine-shaft, an outer section mounted upon said inner section and having its inner face provided with a continuous groove, and adjustable coupling members carried by the inner section and adapted to engage in said groove for frictionally conneeting the sections together when said inner secprising an inner section adapted to be con-.

nected to the engine-shaft, a removable outer section mounted upon said inner section and having its inner face provided with a continuous groove, said outer section being of greater weight than said inner section, segmentshaped coupling members carried by said inner section and adapted to engage in said groove for frictionally connecting the sections together when said inner section is rotating in either direction, and adjusting means for said members.

9. A fly-wheel for explosive-engines comprising an inner section adapted. to be fixed to the engine-sl'iaft and provided with a peripheral groove,a removable outer section mounted upon said inner section and having its inner face formed with a continuous groove, coupling members mounted in the grooves of the inner section and engaging in the groove of the outer section for frictionally connecting said sections together when said inner section is rotating in either direction, and adjustable means for said coupling members carried by said inner section.

10. A fly-wheel for explosive-engines comprising an inner section adaptedto be fixed to the'engine-shaft and provided with peripheral grooves, a removable outer section mounted upon said inner section and of greater weight than said inner section and havingits inner face provided with a continuous groove, adjustable segment-shaped coupling members mounted in the grooves of the inner section and movable with said inner section and adapted to engage in the groove of the outer section for frictionally coupllng said sections together, and adjusting-springs for said members carried by the inner section.

11. A liy-wheel for explosive-engines comprising an inner section adapted to be fixed to the engine-shaft, a removable outer section mounted upon said inner section, and yieldingsegment-shaped coupling members carried by said inner section and engaging in said outer section for frictionally connecting said sections together. 7

In testimony whereof I have hereunto set my hand in presence of two subseribingwit" ll GSSQS.

WILLIAM B. HAYDEN.

WVitnesses: V V ADAM HILL, FRANCI W. LUNGSTROTI-L'. 

